Process of constructing culverts or pipes of concrete



Sept. 21 1926.

i T. NOSE PROCESS OF CONSTRUCTING cULVERTJSf RfPIPEs oF CONCRETE FiledJuly 20. 1923 Patented Sept. 21, 192 6.

UNITED STATES TOICHI NOSE, OI KANAGAWA-KEN, JAPAN.

PROCESS OI CONSTRUC'I'ING CULVEBTS OR PIPES OF CONCRETE.

Application filed July 20, 1823, Serial No. 652,694, and in JapanNovember 18, 1923.

This invention relates to a process of constructing culvert or pipes ofconcrete of any the fluid of the core, constructing outer framescontinuous to the former, support ing the withdrawn core at itsposition, filling in the space between the outer frames and the core,with concrete so as to form culverts or tube continuous to one alreadyformed, and by repeating the same process, forming culvert or tube ofany desired length. The object of this invention is to construct bysimple means a culvert or tube of any desired length, either straight orcurved, without any joint.

The accompanying drawing shows .an example of carrying this inventioninto practice, of which--' Fig. 1 is a longitudinal vertical section;

Fig. 2 shows in sectional plan method of forming a curve continuous to astraight culvert already formed;

Fig. 3- is a cross sectional view of another example; and

Fig. 4 is also a cross, sectional view of another example, and

Fig. 5 is a cros section of a culvert with oval core, which can also beconstructed by this invention.

My invention is .a rocess of constructing culverts or any tubu ar bodyofconcrete to be used as aqueducts or sewers, forlaying electric cablesor other purposes, to be laid. down either under or above ground, to beconstructed at the place where they are to be laid down, or anywhereelse, of any desired length without a joint and of any shape, eitherstraight or curved; and to carry my invention into practice I use a core1), outer frames (2), core supporters (3), and an air compressor orwater pump to force air, or water, into the core.

The core '(1) is a lon bag, the inner layer (4) of which is india-rubberand outer la er (5), a strong duck, or may be made of any suitablematerials of flexible and air, or water, tight nature. At its one endthe core has a hole to admit or-dis charge a fluid, and is-provided withavalve, or cock'(7). .A pipe (8) connects this hole with thecompressoror pum by which a fluid is to be forced into t e core. outerframes (2) consist of two side boards, wlth or without upper boardshinged latched together so that they can be opened or closed at will.The core supporters (3?l are of the same breadth as the outer breadt Theof the culvertto be constructed and has a hole or holes (12) to receivethe core (1) and around the hole or holes (12), there are smaller holes(6) to insert iron bars for reinforcing the concrete.

The accompanying drawing shows" an example of constructing a culvert atthe place where it is to be placed, and the rocess as shown in Figs. 1,2 and 3, 1s as follows. A

At the place where a culvert is to be constructed, either under or aboveground, piles are first driven, and ground work ('10) of concrete isformed thereon. Then side boards (2) are erected on the ground work witha space between them equal to the outer breadth of the culvert to beconstructed. Between these side boards are placed two or more coresupporters (3), andthe. core besmeared with fat'orthe like substance isinserted in the hole' (12). Iron bars (9) vare also inserted in thesmaller holes (6). the core until it is perfectly filled, and the spacebetween the core and the outer frames:

is filled with concrete (11). In filling the space with concrete it ispreferable to commence at'the middle part, or an end, and

continue the work of filling with concrete towards ends, or end,removing the core supporters or supporter, as required. As is shown'in-Fig. 1, the filling work is commenced at the middle part. Two core suThe air or water is forced into.

porters are placed near the middle of t e -core with such a spacebetween them that the core does not bend at that part, and concrete isfilled in. Then remove'the core supporters to places as at ('3'), andfill the spaces at the places between the concrete already filled in andthe core supporters at their new positions. Repeat the work until thewhole length of the core is covered.

Then cover the soft tube thus constructed with up er side board, secureit with latches shown in Fig. 4, the upper side of the outer core, andthus reducing its size, withdraw it out, and construct the outer framesand secure'the core as before adjacent the tube work and the outerframe'are constructed.

in the required curve, the core supporters are placed at a suitabledistance between the outer frames, the core is inserted in the holes(12) and the core of the tube already formed, and iron bars (9) arepassed through the smaller holes (6) of the core supporters. Then thecore and .bars will take a curved shape, and even if the former isfilled with the fluid, it will remain in that sha e. Then fill inconcrete as before describe removing the core supporters as soon as thespace between the formed tube and the next core supporter is filled upwith concrete. In this way, a desired curve of the tube can be formed. 7

Fig. 4 shows another example. of forming a concrete culvert pipewithseveral cores for laying down electric cables or for other ses. In thiscase the core supporters avmg as many bores (12) as required, and asmany-cores are used. In'other details of the work, it is the same asbefore. But as frame is not formed, and the process of giving the lastpressure to the cores in order to make the concrete body more compact,is entirely. dispensed with. p

This invention ma also be used to construct aculvert having a bore of ashape other than round.

-with two inner cores, one larger fshape,'as shown in Fig. 5.

Fig. shows an exampleof forming a and the other smaller (1), is used.-If -al the outer 'a'ndinner cores are filled with a fluid the outer corewill assume an oval To sum up, a cont nuous culvert of any lengthwithout any 'joint can be constructed by a simple means at the placewhere it is tobe laid down. 'A curve of any desired shape may also beformed, with a smooth bore. It goes without saying that. this inventionmay be applied in constructing tubes of concrete 0 any form. I

operations of inflating Claims 1. The process of constructin concreteculverts having passageways of a orm other than circular in crosssection, which consists in preparing an outer form, supporting withinsaid form in spaced relation thereto a colla sible fluid-tight envelope,enclosing in sai envelope a plurality of fluid-tight envelopes ofdifferent sizes and adapted when all of the envelopes are filled, toimpart the desired form to said first collapsible envelope, forcing afluid into said envelope thereby to inflate the same and form a core,pouring concrete into the space between the core and outer form andleaving said concrete to set, discharging the fluid from said corethereby to cause the envelope to collapse, withdrawing said envelopeless than its full length from the set material, reconstructing an outerform around the withdrawn envelope in spaced relation thereto,supporting. the free end of the envelope, and repeating the operationsof .inflating the envelope and pouring concrete into the space betweensaid envelope and the form thereby to produce a culvert of any desiredlength.

2. The process of constructing concrete culverts having passageways ofoval form in cross section, which consists in preparing an outer form,supporting within said form in spaced relation thereto a collapsiblefluidtight envelope, enclosing in said envelope two fluid-tightenvelopes one lar er than the other and adapted when all 0 the envelopesare filled to im rt an oval form to said first collapsible nvelope,forcing a fluid into said envelope thereby to inflate the same and forma core, pouring concrete into the space between the core and outer formand leavi said concrete to set, discharging the fluld from said.corethereby to cause the envelo to. collapse, withdraw.- ing. saidenvelope ess than its full length. from the set material, reconstructingan outer form around the withdrawn envelo in spaced relation thereto,supporting t e' free end of'the envelope, and repeating the the envelopeand pouring concrete into space between said envelope and the formthereb to produce a culvert of any desired lengt In testimony whereof Ihave signed my name to this specification. TQICHI NOSE.

